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Finding the Fourth Proportional to 86,172.88, 129,259.32 and 27,013.12

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Solution

The fourth proportional to 86,172.88, 129,259.32 and 27,013.12 is: 40,519.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,172.88 : 129,259.32 = 27,013.12 : x
  2. Step 2: Convert to fraction form
    86,172.88/129,259.32 = 27,013.12/x
  3. Step 3: Cross multiply
    86,172.88x = 129,259.32 × 27,013.12
  4. Step 4: Simplify right side
    86,172.88x = 3,491,697,522.28
  5. Step 5: Solve for x
    x = 3,491,697,522.28/86,172.88
  6. Step 6: Final answer
    x = 40,519.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.